Hi. Just FYI, https://www.barkbox.com/login doesn't accept command-\, or autofill.
I looked at some of the discussions, and then deleted and recreated my BarkBox login. I rebooted my Mac (latest Safari and Big Sur, using 1password.com). When I hit command-\ the 1password login appeared, but after I logged in, 1password didn't autocomplete the fields. It doesn't work if I choose the 1password icon from the toolbar and choose autofill. It didn't work before I turned off the inline password in Safari. It doesn't work if I go directly into the 1password app and click Open and Fill.
It seems as though web site code is a wily thing these days.
1Password Version: 7.7 (x16)
Extension Version: Not Provided
OS Version: OSX 11.1
Sync Type: 1password.com